smash/ebk-unhb-co2ampel
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code cleanup

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nilo 2020-10-31 12:02:27 +01:00
parent 6569a14ebf
commit 48cbcd7d34
1 changed files with 48 additions and 65 deletions
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61
ebk_co2ampel/ebk_co2ampel.ino
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@ -1,37 +1,31 @@
#include <Arduino.h> #include <Arduino.h>
#include "MHZ19.h" #include "MHZ19.h"
#include "SSD1306Wire.h"
#define RX_PIN 16
#define TX_PIN 17
#define BAUDRATE 9600
#include <Wire.h> // Only needed for Arduino 1.6.5 and earlier MHZ19 myMHZ19;
#include "SSD1306Wire.h" // legacy include: `#include "SSD1306.h"`
#define RX_PIN 16 // Rx pin which the MHZ19 Tx pin is attached to
#define TX_PIN 17 // Tx pin which the MHZ19 Rx pin is attached to
#define BAUDRATE 9600 // Device to MH-Z19 Serial baudrate (should not be changed)
MHZ19 myMHZ19; // Constructor for library HardwareSerial mySerial(1);
HardwareSerial mySerial(1); // (ESP32 Example) create device to MH-Z19 serial
SSD1306Wire display(0x3c, 21, 22); SSD1306Wire display(0x3c, 21, 22);
unsigned long getDataTimer = 0; unsigned long getDataTimer = 0;
int lastvals[120]; int lastvals[120];
int dheight;
void setup() void setup()
{ {
Serial.begin(9600); // Device to serial monitor feedback Serial.begin(9600);
mySerial.begin(BAUDRATE, SERIAL_8N1, RX_PIN, TX_PIN);
mySerial.begin(BAUDRATE, SERIAL_8N1, RX_PIN, TX_PIN); // (ESP32 Example) device to MH-Z19 serial start myMHZ19.begin(mySerial);
myMHZ19.begin(mySerial); // *Serial(Stream) refence must be passed to library begin().
display.init(); display.init();
// display.flipScreenVertically();
display.setContrast(255); display.setContrast(255);
delay(1000); delay(1000);
display.clear(); display.clear();
dheight = display.getHeight();
myMHZ19.autoCalibration(); // Turn auto calibration ON (OFF autoCalibration(false)) myMHZ19.autoCalibration();
for (int x; x <= 119; x = x + 1) { for (int x; x <= 119; x = x + 1) {
lastvals[x] = -1; lastvals[x] = -1;
} }
@ -39,40 +33,33 @@ void setup()
} }
int calc_vpos_for_co2(int co2val, int display_height) {
return display_height - int((float(display_height) / 3000) * co2val);
}
void loop() void loop()
{ {
if (millis() - getDataTimer >= 2000) if (millis() - getDataTimer >= 5000)
{ {
int CO2; int CO2;
CO2 = myMHZ19.getCO2();
/* note: getCO2() default is command "CO2 Unlimited". This returns the correct CO2 reading even
if below background CO2 levels or above range (useful to validate sensor). You can use the
usual documented command with getCO2(false) */
CO2 = myMHZ19.getCO2(); // Request CO2 (as ppm)
for (int x = 1; x <= 119; x = x + 1) { for (int x = 1; x <= 119; x = x + 1) {
lastvals[x - 1] = lastvals[x]; lastvals[x - 1] = lastvals[x];
} }
lastvals[119] = CO2; lastvals[119] = CO2;
display.clear(); display.clear();
for (int h = 1; h < 120; h = h + 1) { for (int h = 1; h < 120; h = h + 1) {
int curval = lastvals[h]; int curval = lastvals[h];
if (curval > 0) { if (curval > 0) {
int vpos = display.getHeight() - int((float(display.getHeight()) / 3000) * lastvals[h]); int vpos = calc_vpos_for_co2(lastvals[h], dheight);
int vpos_1 = display.getHeight() - int((float(display.getHeight()) / 3000) * lastvals[h-1]); int vpos_last = calc_vpos_for_co2(lastvals[h - 1], dheight);
display.drawLine(h - 1, vpos_last, h, vpos);
display.drawLine(h-1, vpos_1, h, vpos);
} }
} }
int8_t Temp;
Temp = myMHZ19.getTemperature(); // Request Temperature (as Celsius)
display.setLogBuffer(5, 30); display.setLogBuffer(5, 30);
display.println(CO2); display.println(CO2);
@ -80,10 +67,6 @@ void loop()
display.display(); display.display();
Serial.print("CO2 (ppm): "); Serial.print("CO2 (ppm): ");
Serial.println(CO2); Serial.println(CO2);
Serial.println();
Serial.print("Temperature (C): ");
Serial.println(Temp);
getDataTimer = millis(); getDataTimer = millis();
} }
} }